Salomon Soft Valve Cover

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It doesn't leak onto my chest or into my backpack anymore. I would buy more, but the product is out of stock.

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These caps are really handy because you can keep the bottles in your backpack, and even if they get squeezed, they won't start leaking. You also get replacement parts for the mouthpiece.

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The cap does its job, but may open at speed. A bit soft fit.

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Go about your business.

If you are going through mud or just want to keep your bottle valves clean then these are ideal.